166304161 has 4 divisors (see below), whose sum is σ = 166364352. Its totient is φ = 166243972.

The previous prime is 166304153. The next prime is 166304197. The reversal of 166304161 is 161403661.

166304161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 166304161 - 2³ = 166304153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166304561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25741 + ... + 31546.

It is an arithmetic number, because the mean of its divisors is an integer number (41591088).

Almost surely, 2^166304161 is an apocalyptic number.

It is an amenable number.

166304161 is a deficient number, since it is larger than the sum of its proper divisors (60191).

166304161 is an equidigital number, since it uses as much as digits as its factorization.

166304161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60190.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 166304161 is about 12895.8970606934. The cubic root of 166304161 is about 549.9219294145.

The spelling of 166304161 in words is "one hundred sixty-six million, three hundred four thousand, one hundred sixty-one".